The Elder Edda and the Younger Edda/Younger Edda/The Way that Leads to Heaven
13. "I must now ask," said Gangler, "which is the path leading from earth to heaven?"
"That is a senseless question," replied Har, with a smile of derision. "Hast thou not been told that the gods made a bridge from earth to heaven, and called it Bifrost? Thou must surely have seen it; but, perhaps, thou callest it the rainbow. It is of three hues, and is constructed with more art than any other work. But, strong though it be, it will be broken to pieces when the sons of Muspell, after having traversed great rivers, shall ride over it."
"Methinks," said Gangler, "the gods could not have been in earnest to erect a bridge so liable to be broken down, since it is in their power to make whatever they please."
"The gods," replied Har, "are not to be blamed on that account; Bifrost is of itself a very good bridge, but there is nothing in nature that can hope to make resistance when the sons of Muspell sally forth to the great combat."